books.google.com - Over the centuries, societies have gradually developed constraints on the use of armed force in the conduct of foreign relations. The crowning achievement of these efforts occurred in the midtwentieth century with the general acceptance among the states of the world that the use of military force for...http://books.google.com/books/about/Humanitarian_Intervention.html?id=sZa_RlVjiSMC&q=President&utm_source=gb-gplus-shareHumanitarian Intervention